drink coffee and live longer
An analysis of the Nurses' Health Studies (NHS, which began in 1976 with RNs aged 30-55 and NHS2 which began in 1989 with RNs aged 25-42) and the Health Professionals Follow-up Study (HPFS, which began in 1986, with male health professionals aged 40-75) assessed total and cause-specific mortality in drinkers of caffeinated and decaffeinated coffee (see coffee and mortality circ2015 in dropbox , or DOI : 10.1161/ CIRCULATIONAHA.115.017341). details: --74,890 women in NHS, 93,054 women in NHS2, and 40,557 men in HPFS, with extensive semi-quantitative food frequency questionnaires (131 items, administered every 4 years), and 4,690,072 person-years of follow-up. 95% white. --up to 30 years of follow-up, with extensive data on known or suspected confounders (biennial questionnaires asking about age, weight, smoking, physical activity, medication use, fam history of diabetes, and self-reported diagnoses including hypertension...